sparkweb

View comment meta beneath the comment on the admin edit screen.
Note that this is display-only and doesn’t add or save comment meta.

Comment Meta Display

View comment meta beneath the comment on the admin edit screen.

Philip Newcomer

This plugin makes all custom fields (post meta) visible in the “Custom Fields” meta box on post edit screens.

Show Hidden Post Meta

As a plugin developer, I create hidden post meta all the time and sometimes I need to see it to debug it. This does what it says it does, and well. Its simple and hasn't been updated for a while, but I'm glad it exists!

PS: If you need someone to take this one over, let me know. I'll keep it tested and updated if you're unable to.

Still works on 5.5

Makes hidden post meta visible on post edit screens

Comment Meta Display vs Show Hidden Post Meta